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Employee Benefits - Additional Information (Detail) - USD ($) | 3 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Dec. 31, 2021 | Sep. 30, 2021 | Dec. 31, 2023 | Dec. 31, 2022 | Oct. 01, 2021
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Deferred compensation plan accumulated liability |  |  | $ 1,273,000 | $ 1,216,000 |
Deferred compensation cost noninterest expense |  |  | 91,000 | 128,000 |
Deferred compensation plans benefit payments |  |  | $ 214,000 | 121,000 |
Employee stock purchase plan, shares |  |  | 454,000 |  |
Deferred compensation common stock shares reserved for issuance Employee stock purchase plan |  |  | 475,000 |  |
Deferred compensation plan percentage of lower of fair market value of shares Employee stock purchase plan |  |  | 95.00% |  |
Maximum [Member] |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Deferred compensation plan value of shares limit to purchase Employee stock purchase plan |  |  | $ 25,000,000 |  |
Deferred compensation plan percentage of purchase limit of annual salary Employee stock purchase plan |  |  | 10.00% |  |
401(k) Plan [Member] |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Percentage of employee contribution match to vested |  |  |  |  | 50.00%
Employee's contribution, percentage | 6.00% |  |  |  |
Contribution expense |  |  | $ 344,000 | $ 278,000 |
Defined Contribution Plan, Description |  |  | Effective October 1, 2021, the Company matches 50 percent of the first 6 percent of the employee's contribution, and this match is immediately vested. |  |
401(k) Plan [Member] | W-2 Wages [Member] |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Non elective contribution percentage |  | 4.00% |  | 3.00% |
Discretionary contribution Percentage |  |  |  | 6.00% |
Supplemental Executive Retirement Plan [Member] |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Contribution expense |  |  | $ 653,000 | $ 469,000 |
Deferred compensation plan accumulated liability |  |  | $ 1,978,000 | $ 1,650,000 |

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